I've had the implanon sine july 2013, and I'm due to get it out in 60 days. My periods are ALWAYS regular, but I have not had a period in 36 days. My last cycle was April 2nd and that was late, I started spotting around April 23 it lasted about 3-4 days, & I have not started since.. I'm worried about pregnancy because we don't use protection, but then again I don't know if it's because the birth control is wearing off?